Feature
- Isolated auxiliary power supply;
- 2*SPST relay outputs;
- Remote test/rest connections;
- Standard 35mm din rail mounting;
- RS485 Modbus communication;
- Adjustable trip levels and time delay.
Technology of Electrical Automatic
ELR-4MA AC Earth Leakage Relay
ELR-4MA AC Earth Leakage Relay
The ELR-4MA AC Earth Leakage Relay is an advanced protection device designed to enhance the safety and reliability of electrical systems. With a residual current transformer (RCT), it continuously monitors the residual current in the busbars or branches of the system. When the residual current exceeds the preset threshold, the relay promptly outputs an alarm signal, ensuring early detection of potential faults.
Equipped with alarm function, the ELR-4MA ensures that alarm signals remain clearly indicated until received the reset signal, facilitating easy fault diagnosis and troubleshooting. ELR-4MA is critical for preventing equipment damage, minimizing downtime, and safeguarding personnel against electrical hazards.
The ELR-4MA AC Earth Leakage Relay is an advanced protection device designed to enhance the safety and reliability of electrical systems. With a residual current transformer (RCT), it continuously monitors the residual current in the busbars or branches of the system. When the residual current exceeds the preset threshold, the relay promptly outputs an alarm signal, ensuring early detection of potential faults.
Equipped with alarm function, the ELR-4MA ensures that alarm signals remain clearly indicated until received the reset signal, facilitating easy fault diagnosis and troubleshooting. ELR-4MA is critical for preventing equipment damage, minimizing downtime, and safeguarding personnel against electrical hazards.
Specification
Relay Parameters
| Working power supply | |
| Power supply | 85-265VAC/DC, optional 48VDC |
| Power consumption | ≤4VA |
| Frequency | 50/60Hz, Accuracy ±0.01Hz |
| I/O capacity | |
| Digital input | 2* DI for reset/ test, NC
dry contact, Ri<500Ω turns on, Ri>100kΩ turns off |
| Digital output | 1* relay NO for safety; 1* relay NC for alarm
Load capacity: 5A@250VAC |
| Others | |
| Communication | RS-485 MODBUS-RTU |
| Display | LCD with backlit |
| Withstand voltage | 2.5KV 1min |
| Insulation | Input, output, power supply to shell >5MΩ |
| Storage environment | -40~70°C |
| Working environment | -25~55°C Altitude ≤2500m,
0~95%RH, non-condensing, non-corrosive gas |
Leakage CT Parameters
| Electrical parameters | |
| Alarm threshold | 5mA-3A, adjustable; |
| Response sensitivity | 1mA |
| Trip time delay | 50ms-10sec, adjustable |
| Operating performance | Type A (acc.to lEC 62020) |
| Operating frequency | 50-400HZ |
| Rated input | 0-1A |
| Measurement range | 10%IN-130%IN |
| Rated output | 0-1V or 0-0.5mA |
| CT ratio error | ≤±0.1% |
| Phase angle | ≤10° |
| Dielectric strength | AC2.5KV 1mA/60S |
| Insulation resistance | DC500V/1000MΩ |
| Other parameters | |
| Housing material | ABS flame retardant grade 94V-0 |
| Frame | PBT |
| Core | Permalloy or nanocrystalline |
| Internal structure | Environmentally friendly epoxy resin |
| Fixture method | Screw fastening |
| Operating temperature | -12°C to +45°C |
| Ambient humidity | ≤85% humidity |
| Wiring method | Terminal type/shielded stranded wire 1.5M |
Application
- Smart grid system;
- Medium and low voltage systems;
- Commercial and residential buildings;
- Utilities and power distribution systems;
- Motor control panels and switchboards;
- Industrial control system (PLC, SCADA, DCS).
Wiring method
Dimension
Dimension: 78*90*60 mm W*H*D
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